JP7072857B2 - Electrical connector - Google Patents

Description

The present invention relates to an electrical connector.

Patent Document 1 discloses an electric connector (receptacle connector) surface-mounted on a printed wiring board.

Japanese Unexamined Patent Publication No. 2002-324606

When a plug connector having a cylindrical shield can be connected to an electric connector surface-mounted on a printed wiring board, for example, there are the following problems.
It is necessary to provide a shield on the electric connector side as well, and the electric connector cannot be miniaturized.
When soldering contacts to a pad, it is difficult to confirm that they have been soldered correctly.
If the shapes of the paired signal contacts are different, the impedance characteristics will deteriorate and the transmission speed will drop.
The present invention has been made, for example, to solve such a problem.

The electrical connector is surface mounted on a printed wiring board. A plug connector is connected to the electric connector. The plug connector includes a cylindrical shield, a flat plate-shaped support portion arranged inside the shield substantially parallel to the central axis of the shield, and a plurality of first surfaces arranged on the first surface of the support portion. It has a surface contact and a plurality of second surface contacts arranged on the second surface of the support portion. The central axis of the shield is substantially perpendicular to the printed wiring board.
The electrical connector includes a main body, a ground contact fixed to the main body and electrically connected to the shield, and a plurality of ground contacts fixed to the main body and electrically connected to the corresponding first surface contact. It includes a first signal contact and a plurality of second signal contacts fixed to the main body and in contact with and electrically connected to the corresponding second surface contacts.
The main body is recessed from the lower surface and the upper surface in a direction substantially perpendicular to the upper surface, and has a cylindrical side surface having the same central axis as the insertion groove into which the support portion is inserted. It has curved left and right surfaces that engage the inside of the shield and planar front and rear surfaces that are substantially parallel to the direction in which the insertion groove extends. ..
The ground contact is arranged on at least one of the left side surface and the right side surface, and the distance from the central axis is shorter than half the length of the insertion groove so as not to interfere with the insertion groove. Have been placed.
The fitting groove may be arranged rotationally symmetrically about the central axis. The ground contact may be located in a direction different from the direction in which the insertion groove extends with respect to the central axis.
The grounding contact may include a first grounding contact arranged on the left side surface and a second grounding contact arranged on the right side surface. The first ground contact and the second ground contact may be arranged rotationally symmetrically with respect to the central axis.
The ground contact extends radially outward with respect to the central axis, its tip is located outside the left side surface and the right side surface, and is soldered to a ground pad provided on the printed wiring board. It may have a ground connection.
The first signal contact extends outward substantially perpendicular to the front side surface, has a tip located outside the front side surface, and is soldered to a first signal pad provided on the printed wiring board. It may have a first signal connection. The second signal contact extends outward substantially perpendicular to the rear side surface, has a tip located outside the rear side surface, and is soldered to a second signal pad provided on the printed wiring board. It may have a second signal connection. The first signal connection portion and the second signal connection portion may be located inside the shield when the plug connector is connected to the electric connector.
The distance between the front side surface and the insertion groove and the distance between the rear side surface and the insertion groove may be substantially the same. The plurality of the first signal contacts and the plurality of the second signal contacts may all have substantially the same shape.

According to the electric connector, the ground contact is arranged at a position where it does not interfere with the insertion groove, and the distance from the central axis is shorter than half the length of the insertion groove, so that the electric connector is miniaturized. can.
If the ground contact is located in a direction different from the direction in which the insertion groove extends with respect to the central axis, the ground contact does not interfere with the insertion groove and the distance from the central axis is shortened. Therefore, the electric connector can be miniaturized.
If the first ground contact and the second ground contact are arranged rotationally symmetrically with respect to the central axis, the force can be balanced.
If the ground connection extends radially outward with respect to the central axis and the tip is located outside the left and right surfaces, it is easy to ensure that the ground pad is properly soldered. You can check it.
If the first signal connection extends outward substantially perpendicular to the front surface and the tip is located outside the front surface, it is easy to solder correctly to the first signal pad. Can be confirmed.
If the second signal connection extends outward substantially perpendicular to the rear side surface and the tip is located outside the rear side surface, it is easy to solder correctly to the second signal pad. Can be confirmed.
When the plug connector is connected to the electric connector, if the first signal connection portion and the second signal connection portion are located inside the shield, it is not necessary to provide a shield on the side of the electric connector. The electric connector can be miniaturized.
When the plurality of the first signal contacts and the plurality of the second signal contacts all have substantially the same shape, the impedance characteristics are improved and the transmission speed is improved.

The perspective view which shows the electric connector 10. The perspective view which shows the electric connector 10. The perspective view which shows the plug connector 80. The side view which shows the signal contact | contact 13a. The side view which shows the ground contact 14a. The front view which shows the ground contact 14a. The plan view which shows the main body 12. Left side view showing the main body 12. The front view which shows the main body 12. Bottom view showing the main body 12. Right side view XI-XI sectional view showing the main body 12. FIG. 2 is a sectional view taken along the line XII-XII showing the main body 12. The cross-sectional view which shows the electric connector 10. The cross-sectional view which shows the electric connector 10. The side view which shows the metal plate 60. The perspective view which shows the suction cap 70. FIG. 5 is a cross-sectional view showing a state in which the electric connector 10 is soldered to a printed wiring board 50.

The electric connector 10 shown in FIGS. 1 and 2 is surface-mounted on a printed wiring board 50 (see FIG. 17), and the plug connector 80 is connected by detachably connecting the plug connector 80 shown in FIG. The signal cable 90 is electrically connected to the circuit formed on the printed wiring board 50.

As shown in FIG. 3, the plug connector 80 includes the following.
<Shield 81> It is made of a conductive material. It is cylindrical. It is electrically connected to the shield of the cable 90.
<Support portion 82> It is made of an insulating material. It is flat. It is arranged and fixed inside the shield 81. It is substantially parallel to the central axis of the shield 81.
<Contacts 83a to 83y> It is made of a conductive material. Each of them is electrically connected to the signal line in the cable 90. The contacts 83a to 83j are arranged at equal intervals on the first surface of the support portion 82. The contacts 83p to 83y are arranged at equal intervals on the second surface of the support portion 82.

As shown in FIGS. 1 and 2, the electric connector 10 includes the following.
<Main body 12> It is made of an insulating material such as plastic.
<Signal contacts 13a to 13y> It is made of an elastic conductive material such as phosphor bronze. It is fixed to the main body 12 by press fitting or the like. By soldering, they are fixed to signal pads (not shown) formed on the printed wiring board 50 and electrically connected to each other.
<Ground contact 14a, 14b> It is made of an elastic conductive material such as phosphor bronze. It is fixed to the main body 12 by press fitting or the like. By soldering, they are fixed to ground pads (not shown) formed on the printed wiring board 50 and electrically connected to each other.

When the plug connector 80 is connected to the electric connector 10, the central axis of the shield 81 becomes substantially perpendicular to the printed wiring board 50, and the contacts 83a to 83y come into contact with the signal contacts 13a to 13y, respectively. The shield 81 comes into contact with the ground contacts 14a and 14b to make an electrical connection.

As shown in FIG. 4, the signal contact 13a has a flat plate shape and has the following.
<Base 30> Located near the center of the signal contact 13a.
<Signal connection portion 31> The base portion 30 extends laterally outward, bends at a substantially right angle and extends downward, then bends at a substantially right angle and extends laterally outward again, and has a crank shape. Is doing. The lower side of the portion extending laterally outward near the tip is soldered to the signal pad of the printed wiring board 50. The portion in contact with the signal pad may be gold-plated.
<Signal contact portion 32> The base portion 30 extends inward in the lateral direction opposite to the signal connection portion 31, bends at an obtuse angle and extends diagonally upward, and then bends at an obtuse angle and reverse diagonally. It extends upward. The bent portion near the tip contacts the contact 83a of the plug connector 80 and makes an electrical connection. The portion in contact with the contact 83a may be gold-plated.
<Press-fitting protrusion 33> It extends upward from the base 30 and has press-fitting claws 341 and 342 on the left and right. It is press-fitted into the main body 12, and the press-fit claw portions 341 and 342 function as a retaining tool. The press-fitting claw portion may be provided on only one of the left side and the right side.
<Tail 36> Slightly extends downward from the base 30 and ends at a position above the tip of the signal connection 31. The press-fitting protrusion 33 functions as a pressure receiving portion that receives a force for press-fitting the main body 12.

The shapes of the signal contacts 13b to 13y are the same as those of the signal contacts 13a. Since the shapes of all the signal contacts 13a to 13y are almost the same, the impedances are almost the same. Therefore, regardless of whether the signal lines connected to any of the signal contacts 13a to 13y are paired, the impedance characteristics are good and high-speed transmission is possible.

As shown in FIGS. 5 and 6, the ground contact 14a has a bent plate shape and has the following.
<Base 40> Located near the center of the ground contact 14a.
<Grounding connection portion 41> It extends downward from the base 40, immediately bends at a substantially right angle, and extends laterally outward. The lower side of the portion extending laterally outward near the tip is soldered to the printed wiring board 50.
<Ground contact portion 42> Extends upward from the base 40, immediately bends at an obtuse angle and extends diagonally upward, then bends obtusely in the opposite direction and extends diagonally upward. ing. The bent portion near the tip contacts the shield 81 of the plug connector 80 and makes an electrical connection.
<Press-fit wing portions 431,432> Extends from the base portion 40 in the left-right direction, has press-fit claw portions 441 to 444 at the tip, and has protrusions 451 and 452 on one surface. It is press-fitted into the main body 12, and the press-fitting claw portions 441 to 444 and the protrusions 451 and 452 function as retaining parts.

The shape of the ground contact 14b is the same as that of the ground contact 14a.

As shown in FIGS. 7 to 12, the main body 12 has the following.
<Upper surface 211 and lower surface 212> It is substantially parallel to the printed wiring board 50.
<Left side surface 213 and right side surface 214> It has a curved surface. It forms part of the side surface of a cylinder with the same central axis. The cylinder has a diameter slightly smaller than the inner diameter of the shield 81 of the plug connector 80 and engages inside the shield 81.
<Front side surface 215 and rear side surface 216> The front side surface 215 and the rear side surface 216 are flat and substantially parallel to each other, and are substantially perpendicular to the upper surface 211 and the lower surface 212. The distances from the central axis are almost equal.
<Suction cap mounting portions 251,252> The front side surface 215 and the rear side surface 216 project laterally outward. The suction cap 70 shown in FIG. 16 is attached.
<Steps 281 to 284> The left side surface 213 and the right side surface 214 project laterally outward. When the plug connector 80 is connected to the electric connector 10, it comes into contact with the tip of the shield 81 to prevent the shield 81 from coming into contact with the printed wiring board 50.
<Legs 271 to 274> The legs project downward from the lower surface 212. All heights are almost the same, and the bottom surface is almost the same plane. ..
<Positioning protrusions 261,262> A columnar shape protruding downward from the lower surface 212, extending below the legs 271 to 274. It is inserted into a hole provided in the printed wiring board 50, whereby the electric connector 10 is positioned with respect to the printed wiring board 50. The positioning protrusion 261 and the positioning protrusion 262 have different diameters in order to prevent the electric connector 10 from being accidentally attached in the opposite direction. It should be noted that the size, shape, orientation, etc. may be different instead of the diameter.

<Insert groove 22> The upper surface 211 is recessed in a direction substantially perpendicular to the upper surface 211. It extends in a direction substantially parallel to the front side surface 215 and the rear side surface 216. It is located substantially in the center of the electric connector 10 and is arranged rotationally symmetrically with respect to the central axis. The distances from the front side surface 215 and the rear side surface 216 are substantially the same, and the distances from the left side surface 213 and the right side surface 214 are also substantially the same. The tip of the support portion 82 of the plug connector 80 is inserted.

<Signal contact arrangement portions 23a to 23y> The lower surface 212 is recessed in a direction substantially perpendicular to the lower surface 212, and the signal contacts 13a to 13y are arranged therein. As shown in FIG. 11, it has a groove portion 231, a contact arrangement portion 232, a press-fitting hole 233, and a communication portion 234. The groove portion 231 extends in a direction substantially perpendicular to the front side surface 215 and the rear side surface 216, and the outside is open to the front side surface 215 or the rear side surface 216. The contact arrangement portion 232 communicates with the insertion groove 22 adjacent to the insertion groove 22, and the signal contact portion 32 is arranged. The press-fitting protrusion 33 is press-fitted into the press-fitting hole 233 from below. The communication portion 234 is located next to the groove portion 231 and below the insertion groove 22, and communicates with the groove portion 231 and the insertion groove 22.

<Grounding contact arranging portions 24a and 24b> The left side surface 213 and the right side surface 214 are recessed, the lower side opens to the lower surface 212, and the grounding contacts 14a and 14b are arranged therein. The insertion groove 22 is located in a direction different from the extending direction with respect to the central axes of the left side surface 213 and the right side surface 214. It has a recess 241 and a press-fitting groove 242, 243. The base 40 of the ground contacts 14a and 14b and the ground contact portion 42 are arranged in the recess 241. The press-fitting grooves 242 and 243 are located next to the recess 241 and the lower side opens to the lower surface 212, and the press-fitting blade portions 431 and 432 are press-fitted from the lower side.

As shown in FIGS. 13 and 14, the bottom surfaces of the signal connection portion 31 and the ground connection portion 41 are all arranged on substantially the same plane, and this plane is slightly below the bottom surfaces of the legs 271 to 274. Is located in. As a result, when the electric connector 10 is soldered to the printed wiring board 50, the signal connection portion 31 and the ground connection portion 41 are pressed against the signal pad and the ground pad provided on the printed wiring board 50. Be done.
The signal contact portion 32 protrudes from the contact arrangement portion 232 and enters the insertion groove 22, and sandwiches the support portion 82 to be inserted into the insertion groove 22 from both sides. As a result, the signal contact portion 32 comes into contact with the contacts 83a to 83y and is electrically connected.
The ground contact portion 42 protrudes outward from the recess 241 and is located outside the left side surface 213 or the right side surface 214. As a result, the shield 81 that engages with the left side surface 213 and the right side surface 214 is contacted and electrically connected.

The signal connection portion 31 extends outward substantially perpendicular to the front side surface 215 and the rear side surface 216, and its tip is located outside the front side surface 215 and the rear side surface 216. However, the tip of the signal connection portion 31 is located inside the shield 81 of the plug connector 80. As a result, it is not necessary to provide a shield on the side of the electric connector 10, and the electric connector 10 can be miniaturized.
The ground connection portion 41 extends radially outward substantially perpendicular to the left side surface 213 and the right side surface 214, and its tip is located outside the left side surface 213 and the right side surface 214.

The distance between the ground contacts 14a and 14b and the central axis is shorter than half the length of the fitting groove 22. That is, the distance between the ground contacts 14a and 14b is shorter than the length of the insertion groove 22. Since the support portion 82 is inserted into the insertion groove 22, the length of the insertion groove 22 must be larger than the width of the support portion 82. Further, since the grounding contacts 14a and 14b come into contact with the inside of the shield 81, the distance between the grounding contacts 14a and 14b must be smaller than the inner diameter of the shield 81. Further, the ground contact 14a and 14b are formed of an elastic material and have an S shape to exert a pressing force for pressing the ground contact portion 42 against the shield 81. Since the grounding contacts 14a and 14b are arranged in a direction different from the direction in which the fitting groove 22 extends with respect to the central axis, the grounding contacts 14a and 14b interfere with the fitting groove 22. Can be placed without any. As a result, the electric connector 10 can be miniaturized.

The ground contact may be provided on only one of the left side surface 213 and the right side surface 214. However, it is preferable to provide both because the force can be balanced. If the ground contact 14a and the ground contact 14b are arranged rotationally symmetrically with respect to the central axis of the shield 81, the balance of forces is further improved.

The metal plate 60 shown in FIG. 15 has a base portion 61, holding portions 62a and 62b, and signal contact portions 63a and 63b. Notches 66a and 66b are provided between the holding portions 62a and 62b and the signal contact portions 63a and 63b.
When manufacturing the electric connector 10, the signal contact portions 63a and 63b of the metal plate 60 are press-fitted into the signal contact arrangement portion of the main body 12 from below. By bending the metal plate 60, the metal plate 60 is divided by the notches 66a and 66b, and the signal contact portions 63a and 63b are separated from the holding portions 62a and 62b to form the signal contacts.
The metal plate 60 may be cut by using a jig or the like without providing the notch.

The suction cap 70 shown in FIG. 16 has a base portion 71, arm portions 72, 73, and claw portions 74, 75.
When the electric connector 10 is soldered to the printed wiring board 50, the suction cap 70 is attached to the electric connector 10 by engaging the claw portions 74 and 75 with the suction cap mounting portions 251,252. do. Next, by sucking the base 71, the suction cap 70 is lifted together with the electric connector 10, the electric connector 10 is carried, and the electric connector 10 is placed at a predetermined position on the printed wiring board 50. Deploy.
Then, the signal connection portion 31 and the ground connection portion 41 are soldered to the signal pad and the ground pad on the printed wiring board 50 by reflow. As shown by an arrow in FIG. 17, when hot air is applied to the electric connector 10 from above, the hot air escapes from the insertion groove 22 through the communication portion 234, so that the signal contact is directly warmed by the hot air. , The temperature rises quickly and evenly. As a result, the time required for soldering can be shortened and the certainty can be improved.

After soldering is complete, check that the soldering is successful. This may be confirmed directly or by visually observing the image taken by the camera, or may be automatically determined by image analysis of the image taken by the camera. In either case, the tips of the signal connection portion 31 and the ground connection portion 41 are located outside the front side surface 215, the rear side surface 216, the left side surface 213, and the right side surface 214, so that confirmation is easy. For example, it is possible to confirm that all the connecting portions are soldered normally by taking a picture from directly above.

The embodiment described above is an example for facilitating the understanding of the present invention. The present invention is not limited thereto, and includes various modifications, modifications, additions, or removals without departing from the scope defined by the appended claims. This can be easily understood by those skilled in the art from the above description.

10 Electric connector, 12 main body, 13a to 13y signal contact, 14a, 14b ground contact, 211 upper surface, 212 lower surface, 213 left side surface, 214 right side surface, 215 front side surface, 216 rear side surface, 22 insertion groove, 23a to 23j, 23p-23y Signal contact arrangement part, 231 groove part, 232 contact arrangement part, 233 press-fitting hole, 234 communication part, 24a, 24b ground contact arrangement part, 241 recess, 242,243 press-fitting groove, 251,252 suction cap mounting part, 261 , 262 Positioning protrusions, 271 to 274 legs, 281 to 284 steps, 30, 40 bases, 31 signal connections, 32 signal contacts, 33 press-fitting protrusions, 341, 342, 441 to 444 press-fitting claws, 36 Tail, 41 ground connection, 42 ground contact, 431,432 press-fit wing, 451, 452 protrusion, 50 printed wiring board, 60 metal plate, 61 base, 62a, 62b holding part, 63a, 63b signal contact part, 66a, 66b notch, 70 suction cap, 71 base, 72,73 arm, 74,75 claw, 80 plug connector, 81 shield, 82 support, 83a-83y contacts, 90 cable.

Claims (6)

Surface mounted on a printed wiring board,
A cylindrical shield, a flat plate-shaped support portion arranged inside the shield substantially parallel to the central axis of the shield, a plurality of first-side contacts arranged on the first surface of the support portion, and the above-mentioned A plug connector having a plurality of second-side contacts arranged on the second side of the support is connected so that the central axis of the shield is substantially perpendicular to the printed wiring board.
It ’s an electrical connector,
With the main body
A ground contact that is fixed to the main body and contacts the shield to make an electrical connection.
A plurality of first signal contacts fixed to the main body and electrically connected to the corresponding first surface contacts, respectively.
It is provided with a plurality of second signal contacts fixed to the main body and in contact with and electrically connected to the corresponding second surface contacts.
The main body is
Bottom and top,
An insertion groove recessed from the upper surface in a direction substantially perpendicular to the upper surface and into which the support portion is inserted.
A curved left side surface and a right side surface that are part of a cylindrical side surface having the same central axis and engage with the inside of the shield.
It has a planar front side surface and a rear side surface that are substantially parallel to the direction in which the insertion groove extends.
The ground contact is
Arranged on at least one of the left side surface and the right side surface,
The distance from the central axis is less than half the length of the insertion groove,
It is arranged at a position that does not interfere with the insertion groove.
Electrical connector. The fitting groove is arranged rotationally symmetrically about the central axis.
The ground contact is located in a direction different from the direction in which the insertion groove extends with respect to the central axis.
The electric connector of claim 1. The ground contact is
The first ground contact located on the left side surface and
It is provided with a second ground contact located on the right side surface.
The first ground contact and the second ground contact are arranged rotationally symmetrically about the central axis.
The electrical connector of claim 1 or 2. The ground contact is
It has a ground connection portion that extends radially outward with respect to the central axis, has a tip located outside the left side surface and the right side surface, and is soldered to a ground pad provided on the printed wiring board. ,
The electric connector according to any one of claims 1 to 3. The first signal contact is
A first signal connection portion that extends outward substantially perpendicular to the front side surface, has a tip located outside the front side surface, and is soldered to a first signal pad provided on the printed wiring board. Have and
The second signal contact is
A second signal connection portion that extends outward substantially perpendicular to the rear side surface, has a tip located outside the rear side surface, and is soldered to a second signal pad provided on the printed wiring board. Have and
The first signal connection portion and the second signal connection portion are located inside the shield when the plug connector is connected to the electric connector.
The electric connector according to any one of claims 1 to 4. The distance between the front side surface and the insertion groove and the distance between the rear side surface and the insertion groove are substantially the same.
The plurality of the first signal contacts and the plurality of the second signal contacts all have substantially the same shape.
The electric connector according to any one of claims 1 to 5.

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